For demonstration purpose i have already saved a fake email password for facebook. But it will work on any website. So lets get started.
How to do ?
1. Open Firefox Web Broweser
4. Now click on website whose password you want to see ans click on show passwordas shown in below image. (Note: It will ask for confirmation so click on yes when dialog box appears)
5. Done, You have hacked password of your victim with few simple steps. You can try this at school computer lab if someone have saved their password.